i have a 1959 evinrude 18hp and a 1970 evinrude 18hp. th 59 takes grease in the lower unit and the 70 take 80-90 oil .can i put 80-90 in the one that has grease in it nowor will that hurt it? thanks george
is there another block that would swap with my 18hp? i have a line on a 1974 25 which is the same a 1973 18hp. maybe some of you even know about others. let me know george